Vaisala PWD22 - Chec; Dry on; DRY on and WET

USER'S GUIDE ____________________________________________________________________
76 __________________________________________________________________ M210543EN-F
If warnings or errors are detected, one or several of the following texts
appear at the end of the message.
See Table 15 and Table 16 below.
Table 15 Hardware Error Texts
Error Text
Description
Backscatter High
Receiver or transmitter contamination signal has
increased more than the ALARM limit given in the
configuration allows.
Transmitter Error
LEDI signal is more than 7 V or less than -8 V.
±12 V Power Error
Receiver/transmitter power is less than 10 V or
more than 14 V.
Offset Error
Offset frequency is <80 or over 170 (PWC22/52
hardware).
Signal Error
Signal frequency + offset frequency = 0, Signal
frequency - offset frequency < -1
Receiver Error
Too low signal in receiver backscatter
measurement.
Data RAM Error
Error in RAM read/write check.
EEPROM Error
EEPROM checksum error.
TS Sensor Error
Measurement is out of limits.
DRD Error
RAINCAP
®
signal is close to zero.
Luminance Sensor Error
PWL111 signal is out of limits.
Table 16 Warnings
Warning
Description
Backscatter Increased
Receiver or transmitter contamination signal has
increased above the WARNING limit selected in the
configuration.
Transmitter Intensity
Low
LEDI signal less than -6 V.
Receiver Saturated
AMBL signal is less than -9 V.
Offset Drifted
Offset Drifted
Visibility Not Calibrated
Visibility calibration coefficient has not been
changed from the default value (see section CAL
below).
CAL
Use the CAL command to calibrate the visibility measurement. The
calibration is done using opaque glass plates with known scatter
properties. The plates belong to the PWA12 calibrator kit.
The command is the following:
CAL Calibrator_signal_value
For example:
>CAL 485